FOUR
BETA

The simplest weight loss system that actually works.

No counting. No logging. No meal plans.
Just four daily rules — and a streak worth protecting.

Try FOUR free →

Honest feedback welcome — this is a beta.

FOUR RULES. EVERY DAY.

01
No Liquid Calories
Water, sparkling water, black coffee, plain tea — nothing else
02
No Snacking
Three meals, nothing between. A handful of nuts still counts.
03
10-Hour Window
First bite to last bite within 10 hours. 8am means finish by 6pm.
04
Exercise
A 20-min walk counts. So does 45 mins in the gym. Anything deliberate.

HOW IT WORKS

1
Tick each rule once you've followed it
Open the app, tap each rule you completed today. Takes 10 seconds.
2
Build your streak
Every perfect day adds to your streak. The longer it gets, the more you want to protect it.
3
Watch the habits form
No willpower required after week two. The streak does the work for you.
★★★★★

"I've tried calorie counting, meal plans, every app. FOUR is the first thing that's actually stuck. The streak makes it feel like a game I don't want to lose."

— Peter, Zurich

Start your streak today.

Free forever. No credit card.
Takes 60 seconds to set up.

Try FOUR free →

Core features free forever · No credit card required

FOUR
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Not medical advice. Individual results vary.